Set of bristles for a toothbrush



FIG. 1 is a perspective front view of a set of bristles for a toothbrush showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a head end view thereof.

The broken line showing of the remainder of the toothbrush is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a set of bristles for a toothbrush, as shown and described. 